101 lines
2.0 KiB
C
101 lines
2.0 KiB
C
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// RUN: clang -fsyntax-only %s -verify
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void I( void (^)(void));
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void (^noop)(void);
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void nothing();
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int printf(const char*, ...);
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typedef void (^T) (void);
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void takeclosure(T);
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int takeintint(int (^C)(int)) { return C(4); }
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T somefunction() {
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if (^{ })
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nothing();
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noop = ^{};
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noop = ^{printf("\nClosure\n"); };
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I(^{ });
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return ^{printf("\nClosure\n"); }; // expected-error {{returning block that lives on the local stack}}
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}
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void test2() {
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int x = 4;
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takeclosure(^{ printf("%d\n", x); });
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while (1) {
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takeclosure(^{
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break; // expected-error {{'break' statement not in loop or switch statement}}
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continue; // expected-error {{'continue' statement not in loop statement}}
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while(1) break; // ok
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goto foo; // expected-error {{goto not allowed}}
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});
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break;
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}
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foo:
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takeclosure(^{ x = 4; }); // expected-error {{expression is not assignable}}
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}
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void (^test3())(void) {
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return ^{}; // expected-error {{returning block that lives on the local stack}}
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}
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void test4() {
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void (^noop)(void) = ^{};
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void (*noop2)() = 0;
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}
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void *X;
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void test_arguments() {
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int y;
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int (^c)(char);
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(1 ? c : 0)('x');
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(1 ? 0 : c)('x');
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(1 ? c : c)('x');
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}
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#if 0
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// Old syntax. FIXME: convert/test.
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void test_byref() {
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int i;
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X = ^{| g |}; // expected-error {{use of undeclared identifier 'g'}}
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X = ^{| i,i,i | };
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X = ^{|i| i = 0; };
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}
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// TODO: global closures someday.
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void *A = ^{};
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void *B = ^(int){ A = 0; };
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// Closures can not take return types at this point.
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void test_retvals() {
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// Explicit return value.
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^int{}; // expected-error {{closure with explicit return type requires argument list}}
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X = ^void(){};
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// Optional specification of return type.
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X = ^char{ return 'x'; }; // expected-error {{closure with explicit return type requires argument list}}
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X = ^/*missing declspec*/ *() { return (void*)0; };
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X = ^void*() { return (void*)0; };
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//X = ^char(short c){ if (c) return c; else return (int)4; };
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}
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#endif
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